The Miami Dolphins have built a very good roster for the 2011 season. Though not every offseason acquisition was their first choice, I'd say their roster moves have been smart and responsible, creating a very good, promising football team.

But with around $6 or $7 million in available cap room, Miami isn't done signing free agents just yet. In fact they just signed NT Ronald Fields, who will probably be Paul Soliai's backup this year.

Langston Walker, T

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Walker struggled with the Raiders in pass protection, but is a quality run blocker.

Miami's best tackle, Jake Long, was just placed on the Active/Physically Unable to Perform list due to complications from offseason shoulder surgery. It doesn't appear to threaten his ability to start the season; Miami can take him off the list whenever they want. All it means is that he can participate in conditioning drills but not football plays.

Vernon Carey, Miami's other starting tackle, is injury-prone and missed four games last season.

Expect Long and Carey to be more than ready to start the season, but should an injury recur, it would be good for Miami to have the experienced Walker as a backup.

Kyle Orton, QB

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The Broncos are a little over $9 million over the cap limit and Kyle Orton's 2011 salary is just under $9 million. They have been shopping Orton on the trade market but haven't been able to complete a deal. The deadline for teams to get their salary under the cap is Thursday.

The above facts point to one probable conclusion: Denver will release Orton by Thursday.

The Dolphins weren't willing to give up the reported second-round pick Denver was asking for in return and Miami is playing this deal wisely. Essentially, they're calling Denver's bluff.

Near the end of the week, I expect Orton to be a free agent and for Miami to sign him to a long-term contract.

Miami doesn't necessarily need Orton; Chad Henne and Matt Moore are expected to compete for the starting job, and though they haven't had much NFL success yet, they do still have potential to perform well in 2011.

However, Orton is an upgrade and can lead the Dolphins to the postseason.

Update: Denver is reportedly on the hook for paying Orton half of his salary already, and he's been outplaying Tim Tebow in practice. Orton could still be released by Thursday, but it's less likely than last week.